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path: root/drivers/rtc/rtc-da9052.c
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Diffstat (limited to 'drivers/rtc/rtc-da9052.c')
-rw-r--r--drivers/rtc/rtc-da9052.c122
1 files changed, 66 insertions, 56 deletions
diff --git a/drivers/rtc/rtc-da9052.c b/drivers/rtc/rtc-da9052.c
index a1cbf64242a5..e5c9486cf452 100644
--- a/drivers/rtc/rtc-da9052.c
+++ b/drivers/rtc/rtc-da9052.c
@@ -20,28 +20,28 @@
#include <linux/mfd/da9052/da9052.h>
#include <linux/mfd/da9052/reg.h>
-#define rtc_err(da9052, fmt, ...) \
- dev_err(da9052->dev, "%s: " fmt, __func__, ##__VA_ARGS__)
+#define rtc_err(rtc, fmt, ...) \
+ dev_err(rtc->da9052->dev, "%s: " fmt, __func__, ##__VA_ARGS__)
struct da9052_rtc {
struct rtc_device *rtc;
struct da9052 *da9052;
};
-static int da9052_rtc_enable_alarm(struct da9052 *da9052, bool enable)
+static int da9052_rtc_enable_alarm(struct da9052_rtc *rtc, bool enable)
{
int ret;
if (enable) {
- ret = da9052_reg_update(da9052, DA9052_ALARM_Y_REG,
- DA9052_ALARM_Y_ALARM_ON,
- DA9052_ALARM_Y_ALARM_ON);
+ ret = da9052_reg_update(rtc->da9052, DA9052_ALARM_Y_REG,
+ DA9052_ALARM_Y_ALARM_ON|DA9052_ALARM_Y_TICK_ON,
+ DA9052_ALARM_Y_ALARM_ON);
if (ret != 0)
- rtc_err(da9052, "Failed to enable ALM: %d\n", ret);
+ rtc_err(rtc, "Failed to enable ALM: %d\n", ret);
} else {
- ret = da9052_reg_update(da9052, DA9052_ALARM_Y_REG,
- DA9052_ALARM_Y_ALARM_ON, 0);
+ ret = da9052_reg_update(rtc->da9052, DA9052_ALARM_Y_REG,
+ DA9052_ALARM_Y_ALARM_ON|DA9052_ALARM_Y_TICK_ON, 0);
if (ret != 0)
- rtc_err(da9052, "Write error: %d\n", ret);
+ rtc_err(rtc, "Write error: %d\n", ret);
}
return ret;
}
@@ -49,31 +49,20 @@ static int da9052_rtc_enable_alarm(struct da9052 *da9052, bool enable)
static irqreturn_t da9052_rtc_irq(int irq, void *data)
{
struct da9052_rtc *rtc = data;
- int ret;
- ret = da9052_reg_read(rtc->da9052, DA9052_ALARM_MI_REG);
- if (ret < 0) {
- rtc_err(rtc->da9052, "Read error: %d\n", ret);
- return IRQ_NONE;
- }
-
- if (ret & DA9052_ALARMMI_ALARMTYPE) {
- da9052_rtc_enable_alarm(rtc->da9052, 0);
- rtc_update_irq(rtc->rtc, 1, RTC_IRQF | RTC_AF);
- } else
- rtc_update_irq(rtc->rtc, 1, RTC_IRQF | RTC_PF);
+ rtc_update_irq(rtc->rtc, 1, RTC_IRQF | RTC_AF);
return IRQ_HANDLED;
}
-static int da9052_read_alarm(struct da9052 *da9052, struct rtc_time *rtc_tm)
+static int da9052_read_alarm(struct da9052_rtc *rtc, struct rtc_time *rtc_tm)
{
int ret;
uint8_t v[5];
- ret = da9052_group_read(da9052, DA9052_ALARM_MI_REG, 5, v);
+ ret = da9052_group_read(rtc->da9052, DA9052_ALARM_MI_REG, 5, v);
if (ret != 0) {
- rtc_err(da9052, "Failed to group read ALM: %d\n", ret);
+ rtc_err(rtc, "Failed to group read ALM: %d\n", ret);
return ret;
}
@@ -84,23 +73,33 @@ static int da9052_read_alarm(struct da9052 *da9052, struct rtc_time *rtc_tm)
rtc_tm->tm_min = v[0] & DA9052_RTC_MIN;
ret = rtc_valid_tm(rtc_tm);
- if (ret != 0)
- return ret;
return ret;
}
-static int da9052_set_alarm(struct da9052 *da9052, struct rtc_time *rtc_tm)
+static int da9052_set_alarm(struct da9052_rtc *rtc, struct rtc_time *rtc_tm)
{
+ struct da9052 *da9052 = rtc->da9052;
+ unsigned long alm_time;
int ret;
uint8_t v[3];
+ ret = rtc_tm_to_time(rtc_tm, &alm_time);
+ if (ret != 0)
+ return ret;
+
+ if (rtc_tm->tm_sec > 0) {
+ alm_time += 60 - rtc_tm->tm_sec;
+ rtc_time_to_tm(alm_time, rtc_tm);
+ }
+ BUG_ON(rtc_tm->tm_sec); /* it will cause repeated irqs if not zero */
+
rtc_tm->tm_year -= 100;
rtc_tm->tm_mon += 1;
ret = da9052_reg_update(da9052, DA9052_ALARM_MI_REG,
DA9052_RTC_MIN, rtc_tm->tm_min);
if (ret != 0) {
- rtc_err(da9052, "Failed to write ALRM MIN: %d\n", ret);
+ rtc_err(rtc, "Failed to write ALRM MIN: %d\n", ret);
return ret;
}
@@ -115,22 +114,22 @@ static int da9052_set_alarm(struct da9052 *da9052, struct rtc_time *rtc_tm)
ret = da9052_reg_update(da9052, DA9052_ALARM_Y_REG,
DA9052_RTC_YEAR, rtc_tm->tm_year);
if (ret != 0)
- rtc_err(da9052, "Failed to write ALRM YEAR: %d\n", ret);
+ rtc_err(rtc, "Failed to write ALRM YEAR: %d\n", ret);
return ret;
}
-static int da9052_rtc_get_alarm_status(struct da9052 *da9052)
+static int da9052_rtc_get_alarm_status(struct da9052_rtc *rtc)
{
int ret;
- ret = da9052_reg_read(da9052, DA9052_ALARM_Y_REG);
+ ret = da9052_reg_read(rtc->da9052, DA9052_ALARM_Y_REG);
if (ret < 0) {
- rtc_err(da9052, "Failed to read ALM: %d\n", ret);
+ rtc_err(rtc, "Failed to read ALM: %d\n", ret);
return ret;
}
- ret &= DA9052_ALARM_Y_ALARM_ON;
- return (ret > 0) ? 1 : 0;
+
+ return !!(ret&DA9052_ALARM_Y_ALARM_ON);
}
static int da9052_rtc_read_time(struct device *dev, struct rtc_time *rtc_tm)
@@ -141,7 +140,7 @@ static int da9052_rtc_read_time(struct device *dev, struct rtc_time *rtc_tm)
ret = da9052_group_read(rtc->da9052, DA9052_COUNT_S_REG, 6, v);
if (ret < 0) {
- rtc_err(rtc->da9052, "Failed to read RTC time : %d\n", ret);
+ rtc_err(rtc, "Failed to read RTC time : %d\n", ret);
return ret;
}
@@ -153,18 +152,14 @@ static int da9052_rtc_read_time(struct device *dev, struct rtc_time *rtc_tm)
rtc_tm->tm_sec = v[0] & DA9052_RTC_SEC;
ret = rtc_valid_tm(rtc_tm);
- if (ret != 0) {
- rtc_err(rtc->da9052, "rtc_valid_tm failed: %d\n", ret);
- return ret;
- }
-
- return 0;
+ return ret;
}
static int da9052_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
struct da9052_rtc *rtc;
uint8_t v[6];
+ int ret;
rtc = dev_get_drvdata(dev);
@@ -175,7 +170,10 @@ static int da9052_rtc_set_time(struct device *dev, struct rtc_time *tm)
v[4] = tm->tm_mon + 1;
v[5] = tm->tm_year - 100;
- return da9052_group_write(rtc->da9052, DA9052_COUNT_S_REG, 6, v);
+ ret = da9052_group_write(rtc->da9052, DA9052_COUNT_S_REG, 6, v);
+ if (ret < 0)
+ rtc_err(rtc, "failed to set RTC time: %d\n", ret);
+ return ret;
}
static int da9052_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
@@ -184,13 +182,13 @@ static int da9052_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alrm)
struct rtc_time *tm = &alrm->time;
struct da9052_rtc *rtc = dev_get_drvdata(dev);
- ret = da9052_read_alarm(rtc->da9052, tm);
-
- if (ret)
+ ret = da9052_read_alarm(rtc, tm);
+ if (ret < 0) {
+ rtc_err(rtc, "failed to read RTC alarm: %d\n", ret);
return ret;
+ }
- alrm->enabled = da9052_rtc_get_alarm_status(rtc->da9052);
-
+ alrm->enabled = da9052_rtc_get_alarm_status(rtc);
return 0;
}
@@ -200,16 +198,15 @@ static int da9052_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
struct rtc_time *tm = &alrm->time;
struct da9052_rtc *rtc = dev_get_drvdata(dev);
- ret = da9052_rtc_enable_alarm(rtc->da9052, 0);
+ ret = da9052_rtc_enable_alarm(rtc, 0);
if (ret < 0)
return ret;
- ret = da9052_set_alarm(rtc->da9052, tm);
- if (ret)
+ ret = da9052_set_alarm(rtc, tm);
+ if (ret < 0)
return ret;
- ret = da9052_rtc_enable_alarm(rtc->da9052, 1);
-
+ ret = da9052_rtc_enable_alarm(rtc, 1);
return ret;
}
@@ -217,7 +214,7 @@ static int da9052_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
{
struct da9052_rtc *rtc = dev_get_drvdata(dev);
- return da9052_rtc_enable_alarm(rtc->da9052, enabled);
+ return da9052_rtc_enable_alarm(rtc, enabled);
}
static const struct rtc_class_ops da9052_rtc_ops = {
@@ -239,10 +236,23 @@ static int da9052_rtc_probe(struct platform_device *pdev)
rtc->da9052 = dev_get_drvdata(pdev->dev.parent);
platform_set_drvdata(pdev, rtc);
+
+ ret = da9052_reg_write(rtc->da9052, DA9052_BBAT_CONT_REG, 0xFE);
+ if (ret < 0) {
+ rtc_err(rtc,
+ "Failed to setup RTC battery charging: %d\n", ret);
+ return ret;
+ }
+
+ ret = da9052_reg_update(rtc->da9052, DA9052_ALARM_Y_REG,
+ DA9052_ALARM_Y_TICK_ON, 0);
+ if (ret != 0)
+ rtc_err(rtc, "Failed to disable TICKS: %d\n", ret);
+
ret = da9052_request_irq(rtc->da9052, DA9052_IRQ_ALARM, "ALM",
da9052_rtc_irq, rtc);
if (ret != 0) {
- rtc_err(rtc->da9052, "irq registration failed: %d\n", ret);
+ rtc_err(rtc, "irq registration failed: %d\n", ret);
return ret;
}
@@ -261,7 +271,7 @@ static struct platform_driver da9052_rtc_driver = {
module_platform_driver(da9052_rtc_driver);
-MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
+MODULE_AUTHOR("Anthony Olech <Anthony.Olech@diasemi.com>");
MODULE_DESCRIPTION("RTC driver for Dialog DA9052 PMIC");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:da9052-rtc");
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.